Antenna for radio systems



June 3, 1930. R. c. AGNER 1,761,608

ANTENNA FOR RADIO SYSTEMS Filed May 16, 1927 Z'Sheets-Sheet 1 June 3,1930.

R. c. AGNER ANTENNA FOR RADIO SYSTEMS Filed May 16, 1927 2 Sheets-Sheet2 "NEW-l!!! V 15 wholly avoided.

Patented June 3, 19.30

PATENT OFFICE UNITED STATES RAYMOND o. AoNEa, or BURLINGTON, wIscNsINANTENNA 1. 503 RADIO sYs'r Ms 7 Application filed May 16,

which is so constructed that a great length.

of wire is employed, although located in a relatively restricted space,sothat the eX- tended or elongated wires usually employed are notnecessary, and in which the chance of a broken or sagging wire isreduced to a minimum, and in which the chances of a poor or faultyconnectlon or of grounds or undesirable connectlons to the wire are IFurther objectsare to provide arnovel form of antenna which isnon-directional, although constructed primarily of wire, which presentsa large surface to the radio waves, and which is remarkably free fromstatic or interference of this general type, but which, instead,materially promotes the clarity of reception.

' Further objects are to provide an antenna .925 which is very simple toconstruct, which is of attractive appearance, and which may be readilyinstalled.

Embodiments of the invention are shown in the accompanying drawings inwhich:

Figure 1 is a view of one form of the antenna; Figure 2 is a top planview of the structure shown in Figure 1; y

Figure 3 is a viewof a modified form of '35 antenna Figure 4 is asectional view of the tip portion of the antenna shown in Figure 1;

Figure 5 is a view of the tip portion showing a modified form Figure 6is a detail the antenna. 7

Referring to the form shown in Figures 1, 2, and 4, it will be seen thatthe antenna comprises an upper and a lower spiders inas dicated:generally bythe reference characters of the'base portion of 1927. semio. 191,726.

1 and 2. These spiders are of identical constructionfand are eachprovided withoutwardly projecting parallel arms radiating from a centralhub 3 and terminating in aperturedarrow heads or points 4. These arrowheads are provided with notches 5 on opposite sides and are preferablyapertured to reduce the weight. The upper spider 1, as may be seen fromFigure 4, is screwed upon the upper end of a central pipe or standard 6.The standard also carries atits upper end an insulating washer orbushing 7 upon which the central pointed tip 8 is screwed, as may beseen from Figure 4. This tip is provided with a screw 9 in its interiore portion, which receives a ground wire 10, such ground wire extendingdownwardly through the entire device, and providing an eflicient meansfor carrying off static. The

tip, it will beseen, is insulated entirely from 5 the rest of theantenna system and is securely grounded.

The lower spider 2 is screwed upon the lower end of thestandard 6, asshown in Figure 6, and the lower end of the standard projects below thespider 2 and is screwed into an insulating bushing 11, which may berelatively heavy, as indicated. This bushing'is externally threaded andscrews into a connecting fitting or nipple member 12 which is providedwith outwardly projecting apertured ears 13 (see Figure 6) for thereception of guy wires, as indicated in Figure 1. Thelower end of thefitting 12 is screwed into the supporting pipe or lower upright 15 whichin turn is screwed into a base 16 provided with a flangeapertured forthe reception of theattaching lag screws or bolts '17, as shown inFigures 1 and 6.

A continuous 'wire18 is looped back and forth over the arrow heads 4 ofthe upper andlower spiders 1 and2, as shown in Figures 1 and 2, and itsends are clamped beneath the head of a bolt 19 secured to the lowerspider 2. .Thisbolt projects through the lower spider and is providedwith nuts 20 for clamping the lead-in wire 21 in place.

It is preferable to construct the spiders 1 and 2 of aluminum stampingsor castings, or else of copper plated malleable iron. The wire ispreferably formed of copper and may be stranded, if desired.

In the form shown in Figure 5, substantially the same construction isfollowed with the exception that the upper spider 22 is provided with acentral aperture 23, and an insulating disc 24: is secured in place bymeans of rivets or bolts, as indicated. In this case, the spiders arenot connected to the central pipe 15. This central pipe extends throughthe insulating disc 2 1 and is clamped thereto by means of a lower nut25 and the upper tip or projecting portion 26. The tips 8 and 26 arepreferably provided with hexagonal lower portions, as shown in Figures 1and 5.

In the form shown in Figure 3, substantially the same construction isfollowed with the exception that the upper and lower spiders 27 and 28are each provided with cutout portions bridged by insulating discs 29.These insulating discs receive the central pipe 30 and preferably thelower portion of the pipe is provided with a closure cap 31 and theupper portion joined in a suitable man ner, as by means of the nipple 32and elbow 33 with a laterally projecting bracket or pipe 34. Thislateral pipe or horizontal portion is screwed into a flanged fitting 35.This flanged fitting is bolted to the, side wall 36 of the house.

In each case, it may be found desirable to ground the supporting pipes.In the forms shown in Figures 3 and 5, the central stand- .ard is notconnected to the antenna system,

- but is connected to the main support. In the form shown in Figures 1,2, 4, and 6, the central standard 6 is electrically connected to theantenna portion, and is insulated from the supporting pipe.

It will thus be seen that a novel form of antenna has been providedwhich presents a large surface to the incoming radio waves and whichemploys a relatively long length of wire and maintains this wire in acompactformation free from any possibility of sagging portions or loosejoints.

It will be seen further that the antenna portion will be tuned by thetuning instrumentality of the set to the incoming waves while the otherportions of the device will be grounded and insulated from the antennaand untuned to the incoming waves.

This grounded portion will thus serve as a means for carrying off staticdisturbances and inasmuch as it is located in close proximity to theantenna itself, it is obvious that it will relieve the antenna of alarge portion of the static ordinarily present in radio reception.

Although the invention has been described in considerable detail, suchdescription is intended as illustrative rather than limiting as theinvention may be variously embodied and as the scope of such inventionis to be determined as claimed.

I claim:

1. A radio antenna comprising a pair of spaced metal spiders, a supportfor holding said spiders, said support being insulated from saidspiders, each of said spiders having radially projecting arms providedwith arrow heads at theirvends, and a continuous wire looped back andforth between the spiders and electrically joined to the arrow head endsof the arms.

2. A radio antenna comprising a pair of spaced metal spiders, a supportfor holding said spiders, said support being insulated from saidspiders, each of said spiders having radially projecting arms providedwith arrow heads at their ends, and a continuous wire looped back andforth between the spiders and electrically joined to the arrow head endsof the arms, said antenna having a grounded tip insulated from saidspiders and located above the uppermost spider, said tip being pointed.

- 3. A radio antenna comprising a pair of spaced metal spiders arrangedhorizontally and located one above the other, said spiders havingprojecting arms, a conducting wire looped back and forth over the armsof the spiders and electrically connected to said spiders, said armsbeing arranged in spaced relation, a lead-in wire clamped to the lowerof said spiders, a central standard passing through the said spiders, asupporting pipe insulated from said spiders and extending downwardlybelow the lower of said spiders.

i. A radio antenna comprising a pair of spaced spiders arrangedhorizontally and located one above the other, said spiders havingprojecting arms, a conducting wire looped back and forth over the armsof the spiders, said arms being arranged in spaced relation, a lead-inwire clamped to the lower of said spiders, a central standard passingthrough the said spiders, a supporting pipe insulated from said spidersand extending downwardly below the lower of said spiders, a pointedupper tip carried by said central standard and insulated from saidspiders, a ground wire connected to said tip and leading downwardlythrough the said central standard.

5. A radio antenna comprising a pair of vertically spaced horizontallyarranged met-a1 spiders provided with radiating arms terminating inarrow heads, said arrow heads being provided with notches therein, aconducting wire looped back and forth over the arrow heads and seatedwithin the said notches and electrically connected to said arrowheads, alead-in wire clamped to the lower spider, a central standard of tubularconstruction electrically connected to said spiders, a projectingpointed cap carried by the upper end of said standard and insulatedtherefrom, a tubular support insulated from said spiders and from saidstandard, and a ground Wire leading upwardly through said tubularsupport and said standard and connected to said tip.

In testimony that I claimthe foregoing I have hereunto set my hand atBurlington, in

o the county of Racine and State of Wisconsin.

RAYMOND C. AGNER.

